Ask the Nutritionist: Dr. Getty's Forum for Equine Nutrition
Welcome to my forum.
Here you will find more than 6 years of questions and my answers. It is searchable and offers a great deal of information.
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All the best,
Dr. Getty
Hi Lisa,
If you want to switch to a beet pulp based diet, I would recommend adding a complete flaxseed meal-based supplement that will provide omega 3 fatty acids along with important antioxidants and minerals. The one that I recommend is Glanzen. It will round out his forage diet to help meet his performance needs.
If alfalfa hay is hard to come by, consider adding alfalfa pellets to the beet pulp meal. It's difficult to give you an exact amount to add without taking a closer look at his overall situation (and you may wish to arrange for a phone visit at some point to do this). But, in the meantime, you can very safely add 1 to 1 1/2 pounds of alfalfa pellets to a meal. Keep in mind that the overall weight (dry weight) of the meal should not exceed 3 to 3 1/2 pounds.
If you use the Glanzen, you would discontinue using the mineral supplement since there would be too much overlap.
For your youngster, alfalfa is very important, but pellets can also be used instead. But, I would go with the Mare/Foal IIP and the flaxseed meal, to make sure that he is getting all the nutrients he needs for growth.
All the best,
Dr. Getty 
Where are you from? Bayfield, Colorado